armv7: ls1021a: Drop macro CONFIG_LS102XA

Use CONFIG_ARCH_LS1021A instead.

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/arch/arm/include/asm/config.h b/arch/arm/include/asm/config.h
index 1ad221a..5674d37 100644
--- a/arch/arm/include/asm/config.h
+++ b/arch/arm/include/asm/config.h
@@ -14,7 +14,7 @@
 #define CONFIG_STATIC_RELA
 #endif
 
-#if defined(CONFIG_LS102XA) || \
+#if defined(CONFIG_ARCH_LS1021A) || \
 	defined(CONFIG_CPU_PXA27X) || \
 	defined(CONFIG_CPU_MONAHANS) || \
 	defined(CONFIG_CPU_PXA25X) || \